When you start Parallels Desktop or a virtual machine, you get this error message:
Your virtual machine may run slow because virtualization support is disabled on your Mac
Then another error message may come up:
Unable to load the Parallels Driver
- Parallels Desktop is not updated to the latest build.
- Your version of Parallels Desktop is not compatible with the version of OS X running on your Mac.
- There is an OS X permissions issue.
- OS X is misconfigured.
- You Mac is running in Safe mode.
Restart your Mac.
Make sure the version of Parallels Desktop installed on your Mac is compatible with the version of OS X you are running. If it is not compatible, upgrade to the latest version of Parallels Desktop.
Update Parallels Desktop to the latest build. Click on the Parallels Desktop menu > Check for Updates... Then download and install the update if one is available.
If the issue persists, open the Disk Utility application on Mac > Mac HD > Repair Disk Permissions. If this does not resolve the problem, go to the next step.
Uninstall Parallels Desktop using the applicable instructions for your version:
Once Parallels Desktop is uninstalled, reboot your Mac and install Parallels Desktop again.
Make sure VT-x virtualization technology is enabled on your Mac: http://support.apple.com/kb/TS2744
If your Mac is running in a Safe Mode, do the following:
- Open Applications -> Utilities -> Terminal application.
Paste the following command into Terminal and press Return:
sudo nvram boot-args=""
Enter your Mac administrator account password when prompted, then press Return.
Note: When you enter your user password after the Password prompt appears, nothing will appear in the Terminal window. Type the password and click Return. If it was entered incorrectly, you will see the message “Sorry, try again” and have another chance.
- Restart your Mac, and try to start your virtual machine.
For additional information please refer to support.apple.com/kb/HT1455